Filter plate and vertical plate-and-frame filter press

Abstract

The invention relates to the technical field of filter pressing, and discloses a filter plate and a vertical plate-and-frame filter press, the filter plate comprises a filter plate body and a grating plate, one side of the filter plate body is provided with a groove, the bottom surface of the groove is provided with a first protrusion structure, the grating plate is provided with a plurality of filter holes for filtrate to pass through, and the first protrusion structure is provided with a second protrusion structure. When the grating plate is placed in the groove, the first protruding structures are matched with the filtering holes in the corresponding positions in an embedded mode, the first protruding structures are arranged on the bottom face of the groove, and the first protruding structures are matched with the filtering holes in the corresponding positions in the grating plate in an embedded mode. Therefore, the grating plate and the filter plate body are fixed together, the problem that the grating plate is taken out of the groove in the filter cake discharging process is effectively avoided, and the use reliability of the filter plate is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure filtration, and particularly to a filter plate and a vertical plate-frame filter press. Background Art

[0002] The vertical plate-frame filter press is a commonly used solid-liquid separation device at present, integrating functions such as filtration, filter cake washing, extrusion, air drying, automatic discharging, and automatic cleaning of filter cloth. It adopts a PLC programmable logic controller and can, according to different periods and different material properties, be programmed by operators at any time to achieve different equipment operation processes and process control parameters. The working process of the vertical plate-frame filter press generally includes: 1) Filtration: When the filter plate frame is closed, the slurry enters each filter cavity through the slurry pipe at the same time. The filtrate passes through the filter cloth into the filter cavity, then enters the filtrate hose, and finally reaches the filtrate pipe; 2) Primary diaphragm extrusion: High-pressure water enters above the diaphragm through the high-pressure water hose, and the diaphragm squeezes the filter cake towards the surface of the filter cloth, thereby squeezing the filtrate out of the filter cake; 3) Filter cake washing: The washing liquid is pumped to the filtration cavity through the same path as the slurry. Since the cavity is filled with liquid, the diaphragm is lifted, and water is squeezed out from above the diaphragm. The washing liquid flows into the discharge pipe after passing through the filter cake and the filter cloth; 4) Secondary diaphragm extrusion: After the washing stage, the washing liquid remaining in the filter cavity is squeezed out by the method in process 2) above. 5) Filter cake air drying: The final drying of the filter cake is completed by compressed air. The air entering through the distribution pipe fills the filtration cavity, lifts the diaphragm, and discharges the high-pressure water on the diaphragm from the filter press. The airflow through the filter cake reduces the moisture content to an optimal level and at the same time empties the filtrate cavity. 6) Discharge of the filter cake and washing of the filter cloth: When the drying process is completed, the plate-frame assembly opens, and the filter cloth driving mechanism starts to operate. The filter cake on the filter cloth is discharged from both sides of the filter press, and at the same time, the washing device installed in the filter press automatically flushes both sides of all filter cloths to ensure consistent filtration effects before and after.

[0003] Most of the filter plates of the existing vertical plate-frame filter presses adopt PTFE material box-type filter plates. A smooth groove is processed on one side plate surface, and a grid plate with a porous structure is freely placed in the smooth groove for supporting the filter cloth. A convex structure is arranged on one side of the grid plate close to the smooth groove so as to form a diversion gap when it is placed in the smooth groove. However, in actual use, there is a phenomenon that the grid plate breaks away from the groove, which has an adverse impact on subsequent pressure filtration production. Specifically, it is manifested as follows: The grid plate breaks under the action of the transmission guide roller, and the broken grid plate enters the subsequent process with the material, causing equipment damage; due to the absence of the grid plate, the filter cloth lacks support, and the material after filtration through the filter cloth blocks the drain holes with the deformed filter cloth, resulting in poor drainage and affecting the pressure filtration efficiency. Summary of the Invention

[0004] The object of the present invention is to solve the problem that the grille plate of the existing vertical plate and frame filter press disengages from the groove and brings adverse effects, and to provide a filter plate and a vertical plate and frame filter press, which can effectively overcome the problem of the grille plate disengaging from the groove and ensure the reliability of the use of the filter plate.

[0005] To achieve the above object, the first aspect of the present invention provides a filter plate, comprising:

[0006] A filter plate body, on one side of which there is a groove, and on the bottom surface of the groove there is a first convex structure; and

[0007] A grille plate, which has a plurality of filter holes for filtrate to pass through;

[0008] Wherein, when the grille plate is placed in the groove, the first convex structure forms an inlay fit with the corresponding filter hole.

[0009] Optionally, there are a plurality of the first convex structures, and the plurality of first convex structures are arranged at intervals on the bottom surface, and the plurality of first convex structures correspond to the corresponding number of filter holes one by one to form an inlay fit.

[0010] Optionally, a second convex structure is further provided on the bottom surface, and the upper end surface of the second convex structure is lower than the upper end surface of the first convex structure, so that the second convex structure can support the grille plate when the first convex structure forms an inlay fit with the filter hole.

[0011] Optionally, the second convex structure is a cylindrical convex, a frustum-shaped convex, a strip-shaped convex or a combination thereof.

[0012] Optionally, the second convex structure includes a combination of a plurality of frustum-shaped convexes and a combination of a plurality of strip-shaped convexes, each combination of frustum-shaped convexes includes a plurality of frustum-shaped convexes arranged at intervals, and each combination of strip-shaped convexes includes a plurality of strip-shaped convexes arranged at intervals;

[0013] The plurality of frustum-shaped convex combinations and the plurality of strip-shaped convex combinations are arranged alternately along the length direction of the filter plate body.

[0014] Optionally, the second convex structure includes a plurality of frustum-shaped convexes and a plurality of strip-shaped convexes, the plurality of frustum-shaped convexes are arranged at the edge position of the bottom surface, and the plurality of strip-shaped convexes are arranged at the center position of the bottom surface.

[0015] Optionally, a support portion is provided at the edge of the bottom surface for supporting the grille plate.

[0016] Optionally, the filter plate further includes a connecting member for connecting and fixing the grille plate to the groove.

[0017] Optionally, a boss is provided on the bottom surface, and the connecting member is configured to connect and fix the grid plate to the boss.

[0018] In a second aspect of the present invention, a vertical plate and frame filter press is provided, and the vertical plate and frame filter press includes the filter plate described above.

[0019] The inventors of the present application have found through in-depth research that in the existing vertical plate and frame filter press, the fundamental reason for the grid plate to break away from the groove is that the center position of the filter plate body has deformed upward, and this deformation occurs during the operation of the filter press, and it is difficult to overcome without changing the existing filter plate material. The upward convexity of the center position of the filter plate body causes the grid plate to be lifted and form a phenomenon higher than the filter plate body. During the process of discharging the filter cake, due to the certain viscosity of the filter cake, there is a risk that the grid plate will be taken out of the groove, and this risk increases with the increase of the deformation degree of the filter plate body.

[0020] According to the technical solution provided by the present invention, by providing a first convex structure on the bottom surface of the groove and making the first convex structure form an inlay fit with the corresponding filter holes on the grid plate, the grid plate is fixed to the filter plate body, effectively avoiding the problem that the grid plate is taken out of the groove during the discharge of the filter cake, and ensuring the reliability of the use of the filter plate. Description of the Drawings

[0021] Figure 1 is a schematic structural diagram of a filter plate provided by the present invention;

[0022] Figure 2 is Figure 1 an enlarged schematic diagram of position A in

[0023] Figure 3 is a schematic structural diagram of a filter plate body provided by the present invention;

[0024] Figure 4 is Figure 3 an enlarged schematic diagram of position B in

[0025] Figure 5 is a schematic structural diagram of another filter plate body provided by the present invention.

[0026] Description of the Reference Numerals

[0027] 100. Filter plate body; 110. Groove; 111. Bottom surface; 112. Groove wall; 1121. Drainage hole; 120. Second convex structure; 121. Combination of frustum-shaped protrusions; 1211. Frustum-shaped protrusion; 122. Combination of strip-shaped protrusions; 1221. Strip-shaped protrusion; 130. Boss; 140. Support part; 200. Grille plate; 210. Filter hole; 300. Connector. Detailed implementation mode

[0028] The following will combine the accompanying drawings to elaborate on the detailed implementation mode of the present invention. It should be understood that the detailed implementation mode described herein is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0029] Combined with Figure 1 As shown, the present invention provides a filter plate, including a filter plate body 100 and a grille plate 200. A groove 110 is provided on one side of the filter plate body 100, and a first convex structure is provided on the bottom surface 111 of the groove 110. The grille plate 200 has a plurality of filter holes 210 for filtrate to pass through. Among them, when the grille plate 200 is placed in the groove 110, the first convex structure and the filter holes 210 at corresponding positions form an inlay fit.

[0030] In the technical solution provided by the present invention, by providing a first convex structure on the bottom surface 111 of the groove 110 and making the first convex structure form an inlay fit with the filter holes 210 at corresponding positions on the grille plate 200, the grille plate 200 and the filter plate body 100 are fixed together, effectively avoiding the problem that the grille plate 200 is taken out of the groove 110 during the process of discharging the filter cake, and ensuring the reliability of the use of the filter plate.

[0031] It should be noted that in the present invention, the inventor cleverly utilizes the filter holes 210 provided in the grille plate 200 itself. By providing a first convex structure on the bottom surface 111 of the groove 110 to form an inlay fit with the filter holes 210, the problem that the grille plate 200 is pushed out and then taken away from the groove 110 due to the deformation of the filter plate body 100 is overcome. The integrated structure formed by the grille plate 200 and the filter plate body 100 can also overcome the problem that the filter plate body 100 is prone to deformation caused by the opening of the groove 110 to a certain extent.

[0032] It can be understood that in order to improve the connection effect between the grille plate 200 and the filter plate body 100 and effectively prevent the grille plate 200 from being taken away from the groove 110, a plurality of the first convex structures are provided, and the plurality of the first convex structures are arranged at intervals on the bottom surface 111. The plurality of the first convex structures correspond to the corresponding number of the filter holes 210 one by one to form an inlay fit.

[0033] In the present invention, the first convex structure can be in any suitable form as long as it can form an inlay fit with the filter holes 210. In a specific embodiment of the present invention, the first convex structure is a frustum-shaped structure. When the grille plate 200 is placed in the groove 110, the frustum-shaped structure is inserted into the filter holes 210 to form an interference fit, effectively preventing the grille plate 200 from being taken away from the groove 110 during the discharge process of the filter cake.

[0034] In some embodiments, a second convex structure 120 is further provided on the bottom surface 111. The upper end surface of the second convex structure 120 is lower than the upper end surface of the first convex structure, so that the second convex structure 120 can support the grille plate 200 when the first convex structure forms an inlay fit with the filter holes 210.

[0035] In the present invention, the function of the second convex structure 120 is to form a spacing between the grille plate 200 and the groove 110, so that the filtrate passing through the filter cloth and the filter holes 210 can flow out through the diversion channels provided on the groove wall 112 of the groove 110. Compared with the prior art solution of providing a convex structure on one side of the grille plate 200 close to the groove 110, in the present invention, the second convex structure 120 is formed on the bottom surface 111 of the groove 110, eliminating the need to form both the filter holes 210 and the convex structure on the grille plate 200, thereby reducing the processing difficulty of the grille plate 200.

[0036] In the present invention, the diversion channels are drain holes 1121 provided on the groove wall 112 of the groove 110. To improve the drainage efficiency, multiple groups of the diversion channels are provided at intervals along the length direction of the filter plate body 100. For example, two groups are provided, and each group of the diversion channels includes multiple drain holes 1121 to ensure that the filtrate passing through the filter cloth and the filter holes 210 can be discharged in time.

[0037] It can be understood that the second convex structure 120 can be in any suitable structure as long as it can support the grille plate 200. In the present invention, the second convex structure 120 is a cylindrical protrusion, a frustum-shaped protrusion 1211, a strip-shaped protrusion 1221, or a combination thereof.

[0038] In a specific embodiment of the present invention, as shown in Figure 3 the second convex structure 120 includes multiple frustum-shaped protrusion combinations 121 and multiple strip-shaped protrusion combinations 122. Each frustum-shaped protrusion combination 121 includes multiple frustum-shaped protrusions 1211 arranged at intervals, and each strip-shaped protrusion combination 122 includes multiple strip-shaped protrusions 1221 arranged at intervals; the multiple frustum-shaped protrusion combinations 121 and the multiple strip-shaped protrusion combinations 122 are arranged alternately along the length direction of the filter plate body 100.

[0039] In another specific embodiment of the present invention, in combination with Figure 5 As shown, the second convex structure 120 includes a plurality of frustum-shaped protrusions 1211 and a plurality of strip-shaped protrusions 1221. The plurality of frustum-shaped protrusions 1211 are arranged at the edge position of the bottom surface 111, and the plurality of strip-shaped protrusions 1221 are arranged at the central position of the bottom surface 111.

[0040] It should be noted that, compared with the strip-shaped protrusions 1221, the frustum-shaped protrusions 1211 are more difficult to process, but have a stronger liquid guiding ability. They can enable the filtrate passing through the filter cloth and the filter holes 210 to flow quickly to the groove wall 112 of the groove 110 and flow out through the diversion channels provided on the groove wall 112. In the above technical solution provided by the present invention, through the combined use of the frustum-shaped protrusions 1211 and the strip-shaped protrusions 1221, the processing difficulty of the second convex structure 120 is reduced, and the diversion effect of the filtrate is ensured, ensuring that the filtrate passing through the filter cloth and the filter holes 210 can be discharged in time.

[0041] In some embodiments, a support portion 140 is provided at the edge of the bottom surface 111 for supporting the grid plate 200. By providing the support portion 140 to support the grid plate 200, a spacing can be formed between the grid plate 200 and the bottom surface 111 of the groove 110, so that the filtrate passing through the filter cloth and the filter holes 210 flows out through the diversion channels provided on the groove wall 112 of the groove 110; in addition, the support portion 140 can also cooperate with the grid plate 200 to form a relatively sealed cavity. Specifically, a sealing member, such as a sealing ring, can be provided between the support portion 140 and the grid plate 200 to improve the sealing performance between the two.

[0042] In some embodiments, in order to further prevent the grid plate 200 from being taken away from the groove 110 during the discharge of the filter cake. In combination with Figure 1 and Figure 2 As shown, the filter plate further includes a connecting member 300, and the connecting member 300 is used to connect and fix the grid plate 200 to the groove 110. In the present invention, the connecting member 300 can specifically be a screw, that is, the grid plate 200 is locked and fixed to the groove 110 by screws.

[0043] It can be understood that, in order to ensure the connection effect between the grid plate 200 and the filter plate body 100 and prevent the problem that the local part of the filter plate body 100 is deformed and the grid plate 200 is lifted, a plurality of the connecting members 300 are provided, and the plurality of bosses 130 are arranged at intervals along the length direction of the filter plate body 100.

[0044] In some embodiments, in combination with Figure 3 and Figure 4As shown, a boss 130 is provided on the bottom surface 111, and the connecting member 300 is configured to connect and fix the grille plate 200 to the boss 130.

[0045] In a second aspect of the present invention, a vertical plate-frame filter press is provided. The vertical plate-frame filter press includes the above-mentioned filter plate. By introducing the above-mentioned filter plate into the vertical plate-frame filter press, the phenomenon that the grille plate 200 disengages from the groove 110 is effectively avoided, ensuring the stability of the operation of the vertical plate-frame filter press.

[0046] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention. To avoid unnecessary repetition, the present invention will not separately describe various possible combinations. But these simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A filter plate, characterized in that, it comprises: a filter plate body (100), on one side of the filter plate body (100) there is a groove (110), and on the bottom surface (111) of the groove (110) there is a first protrusion structure; and a grille plate (200), the grille plate (200) has a plurality of filter holes (210) for filtrate to pass through; wherein, when the grille plate (200) is placed in the groove (110), the first protrusion structure and the corresponding filter hole (210) form an inlaid fit.

2. The filter plate according to claim 1, characterized in that, there are a plurality of the first protrusion structures, and the plurality of first protrusion structures are spaced apart on the bottom surface (111), and the plurality of first protrusion structures correspond to the corresponding number of filter holes (210) one by one to form an inlaid fit.

3. The filter plate according to claim 1, characterized in that, a second protrusion structure (120) is further provided on the bottom surface (111), and the upper end surface of the second protrusion structure (120) is lower than the upper end surface of the first protrusion structure, so that the second protrusion structure (120) can support the grille plate (200) when the first protrusion structure and the filter hole (210) form an inlaid fit.

4. The filter plate according to claim 3, characterized in that, the second protrusion structure (120) is a cylindrical protrusion, a frustum-shaped protrusion (1211), a strip-shaped protrusion (1221) or a combination thereof.

5. The filter plate according to claim 3, characterized in that, the second protrusion structure (120) includes a plurality of frustum-shaped protrusion combinations (121) and a plurality of strip-shaped protrusion combinations (122), each frustum-shaped protrusion combination (121) includes a plurality of frustum-shaped protrusions (1211) arranged at intervals, and each strip-shaped protrusion combination (122) includes a plurality of strip-shaped protrusions (1221) arranged at intervals; the plurality of frustum-shaped protrusion combinations (121) and the plurality of strip-shaped protrusion combinations (122) are arranged alternately along the length direction of the filter plate body (100).

6. The filter plate according to claim 3, characterized in that, the second protrusion structure (120) includes a plurality of frustum-shaped protrusions (1211) and a plurality of strip-shaped protrusions (1221), the plurality of frustum-shaped protrusions (1211) are arranged at the edge position of the bottom surface (111), and the plurality of strip-shaped protrusions (1221) are arranged at the center position of the bottom surface (111).

7. The filter plate according to claim 1, characterized in that, a support portion (140) is provided at the edge of the bottom surface (111) for supporting the grille plate (200).

8. The filter plate according to any one of claims 1-7, characterized in that, the filter plate further includes a connecting member (300), and the connecting member (300) is used to connect and fix the grille plate (200) to the groove (110).

9. The filter plate according to claim 8, characterized in that, A boss (130) is provided on the bottom surface (111), and the connecting member (300) is configured to connect and fix the grille plate (200) to the boss (130).

10. A vertical plate and frame filter press characterized in that the vertical plate and frame filter press includes the filter plate according to any one of claims 1-9.

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